Uplink Power Control Based on Multiple Reference Signals

ABSTRACT

According to certain embodiments, a method implemented in a wireless device comprises determining configuration data representing a set of configurations. The method comprises receiving at least one reference signal from a transmission point. The receiving of the at least one reference signal is performed in accordance with a configuration selected from the set, wherein the configuration is related to uplink power control and is specific to an uplink channel or signal or a group thereof. The method comprises measuring a propagation-related quantity on the basis of the at least one reference signal and deriving an uplink power setting on the basis of the measured propagation-related quantity.

TECHNICAL FIELD

Disclosed herein are methods and devices for enabling uplink powercontrol on the basis of reference signal measurements.

BACKGROUND

1. Power Control

Setting output power levels of transmitters, base stations in downlinkand mobile stations in uplink, in mobile systems is commonly referred toas power control (PC). Objectives of PC include improved capacity,coverage, improved system robustness, and reduced power consumption.

In 3GPP Long Term Evolution (LTE), PC mechanisms can be categorized into the groups (i) open-loop, (ii) closed-loop, and (iii) combined open-and closed loop. These differ in what input is used to determine thetransmit power. In the open-loop case, the transmitter measures somesignal sent from the receiver, and sets its output power based on this.In the closed-loop case, the receiver measures the signal from thetransmitter, and based on this sends a Transmit Power Control (TPC)command to the transmitter, which then sets its transmit poweraccordingly. In a combined open- and closed-loop scheme, both inputs areused to set the transmit power.

In systems with multiple channels between the terminals and the basestations, e.g. traffic and control channels, different power controlprinciples may be applied to the different channels. Using differentprinciples yields more freedom in adapting the power control principleto the needs of individual channels. The drawback is increasedcomplexity of maintaining several principles.

2. PC Loops

In LTE release 10, for instance, the user equipment (UE) is initiallyperforming PC for the physical random access channel (PRACH) using

P _(PRACH)=min{P _(CMAX,c)(i),PREAMBLE_RECEIVED_TARGET_POWER+PL _(c)}.

For details, see 3GPP TR 36.213, clause 5.1 and subclauses. After aconnection has been established between the UE and the eNodeB, the UEcan be configured for performing uplink (UL) PC also on physical uplinkcontrol channel (PUCCH), physical uplink shared channel (PUSCH) andsounding reference signal (SRS) transmission. Setting the UE transmitpower for a PUCCH transmission is done from

P _(PUCCH)=min{P _(CMAX,c) ,P _(0,PUCCH) +PL _(c)+∇_(Format)+δ}

Here, P_(PUCCH) is the transmit power to use in a given subframe andPL_(c) is the pathloss estimated by the UE. For PUSCH one instead usesthe equation

P _(PUSCH,c)=min{P _(CMAX,c) −P _(PUCCH) ,P _(0,PUSCH) +αPL _(c)+10log₁₀ M+∇ _(MCS)+δ}

where c denotes the serving cell and P_(PUSCH,c) is the transmit powerto use in a given subframe. For SRS one defines

P _(SRS,c)(i)=min{P _(CMAX,c)(i),P _(SRSOFFSET,c)(m)+10 log₁₀ M _(SRS,c)+P _(0,PUSCH)(j)+α_(c)(j)·PL _(c) +f _(c)(i)}.

Also here, PL_(c) contributes to the power level for the UEtransmission. It is clear from this that the pathloss estimationconducted by the UE plays an important role of the PC. The pathloss mustin turn be estimated from a downlink (DL) transmission and is typicallydone by measuring on a reference signal.

3. Beam-Specific Power Control

It is envisioned that 3GPP New Radio (NR) supports beam-specific powercontrol, although the exact details on what beam specificity implies arenot yet fully decided. Beam-specific PC may for instance be a schemethat enables use cases where separate power control in multiple UEtransmit (TX) and gNB (base station in NR) receive (RX) beam pairs aremaintained. Use cases include for instance

-   -   A UE transmitting to a transmission point (TRP) using a certain        beam switches to another beam and then consequently also        switches from one PC loop to another.    -   A UE transmitting to a TRP switches to another TRP and then        consequently also switches from one PC loop to another.        However, one should keep in mind that these kinds of use cases        are primarily intended for high-band operation and it is        essential to make NR UL PC work well also for low-band        operation. Here a solution similar to the solution in LTE should        be sufficient where non-beam-specific PC was used. Hence, there        is no clear justification to design all parts of the PC        framework in NR to be beam-specific.

4. RS Types

In NR, it is envisioned that there will exist several different kinds ofreference signals, such as channel state information reference signal(CSI-RS), synchronization signal (SS) (e.g., primary SS, secondary SS),sounding reference signal (SRS), phase tracking reference signal (PTRS),and tracking reference signal (TRS). It is also envisioned that the PCis allowed to base its path loss estimation on a subset of thosereference signals. However, it has been agreed that at least SS andCSI-RS are included in this subset. Possibly TRS will be included too.This means that PC will be carried out based on different kinds ofreference signals which is a difference compared to LTE, where only CRSwas used for PC for all channels. This is illustrated by the signalprocessing diagram in FIG. 1 , where a path loss parameter PL_(c) ismeasured based on CRS (step 111) and then contributes to the powersettings for each of SRS, PUSCH, and PUCCH via respective calculationrules 121, 122, 123.

5. Problems with Existing Solutions

For the path loss estimation in LTE, it was possible to rely on CRSwhich was transmitted in a periodic and cell-specific manner. In NR, andpotentially later releases of LTE, a more flexible, but also lessstatic, reference signal framework is considered and path lossestimation for PC (and non-beam-specific PC in particular) will be basedon different types of reference signals. This makes the problem ofestimating the path loss-based on a reference signal more complicated.

SUMMARY

Embodiments of the present disclosure may provide solutions forperforming power control based on different types of reference signals.

According to certain embodiments, a method implemented in a wirelessdevice comprises determining configuration data representing a set ofconfigurations. The method comprises receiving at least one referencesignal from a transmission point. The receiving of the at least onereference signal is performed in accordance with a configurationselected from the set, wherein the configuration is related to uplinkpower control and is specific to an uplink channel or signal or a groupthereof. The method comprises measuring a propagation-related quantityon the basis of the at least one reference signal and deriving an uplinkpower setting on the basis of the measured propagation-related quantity.

In certain embodiments, the set of configurations is specific to theuplink channel or signal or group thereof.

In certain embodiments, the configuration data indicates a size of a setof reference signals in each configuration. In certain embodiments, theconfiguration data is received in semi-static signaling.

In certain embodiments, the method further comprises receiving firstcontrol information indicating the selected configuration in the set ofconfigurations. In certain embodiments, the first control information isspecific for an uplink channel or signal or group thereof. In certainembodiments, the first control information is received in dynamicsignaling. In certain embodiments, the first control information isreceived in semi-static signaling.

In certain embodiments, the method further comprises receiving secondcontrol information. The second control information is related to a sametime or frequency position as the first control information but isspecific to a different uplink channel or signal or group thereof.

In certain embodiments, the channel or signal or group thereof is one ormore of: PUSCH, PUCCH, and/or SRS.

In certain embodiments, the propagation-related quantity is one or moreof path loss relative to the transmission point and/or a pathloss-related quantity.

In certain embodiments, the configuration is independently selectablefrom the set for each time segment or each frequency segment or eachtime-frequency tile.

Also disclosed is a wireless device, a computer program, and a computerprogram product to perform any of the embodiments of the above describedmethod implemented in a wireless device. As an example, in certainembodiments, a wireless device comprises a receiver, a transmitter,processing circuitry and a memory storing instructions executable by theprocessing circuitry. In certain embodiments, the wireless device is auser equipment. The instructions comprise instructions for determiningconfiguration data representing a set of configurations and instructionsfor receiving at least one reference signal from a transmission point.The receiving of the at least one reference signal is performed inaccordance with a configuration selected from the set, wherein theconfiguration is related to uplink power control and is specific to anuplink channel or signal or a group thereof. The instructions compriseinstructions for measuring a propagation-related quantity on the basisof the at least one reference signal, and instructions for deriving anuplink power setting on the basis of the measured propagation-relatedquantity. As another example, in certain embodiments, a computer programcomprises computer-readable instructions for causing a programmableprocessor to perform any of the embodiments of the above describedmethod implemented in a wireless device. As another example, in certainembodiments, a computer program product comprising a computer-readablemedium storing the computer program.

According to certain embodiments, a method implemented in a transmissionpoint comprises transmitting configuration data representing a set ofconfigurations. The set of configurations relate to uplink power controlof a wireless device to be served by the transmission point. The methodalso comprises transmitting at least one reference signal.

In certain embodiments, the set of configurations is specific to anuplink channel or signal or group thereof.

In certain embodiments, the configuration data indicates a size of a setof reference signals in each configuration. In certain embodiments, theconfiguration data is transmitted in semi-static signaling.

In certain embodiments, the method further comprising transmitting firstcontrol information indicating a selected configuration in the set ofconfigurations. In certain embodiments, the first control information isspecific for an uplink channel or signal or group thereof. In certainembodiments, the first control information is transmitted in dynamicsignaling. In certain embodiments, the first control information istransmitted in semi-static signaling.

In certain embodiments, the method further comprises transmitting secondcontrol information. The second control information is related to a sametime or frequency position as the first control information but isspecific to a different uplink channel or signal or group thereof.

In certain embodiments, the channel or signal or group thereof is one ormore of PUSCH, PUCCH, and/or SRS.

In certain embodiments, the configuration is independently selectablefrom the set for each time segment or each frequency segment or eachtime-frequency tile.

Also disclosed is a transmission point, a computer program, and acomputer program product to perform any of the embodiments of the abovedescribed method implemented in a transmission point. As an example, incertain embodiments, a transmission point comprises a receiver, atransmitter, processing circuitry and a memory storing instructionsexecutable by the processing circuitry. In certain embodiments, thetransmission point is a base station, such as a gNB. The instructionscomprise instructions for transmitting configuration data representing aset of configurations. The set of configurations relate to uplink powercontrol of a wireless device to be served by the transmission point. Theinstructions further comprise instructions for transmitting at least onereference signal. As another example, in certain embodiments, a computerprogram comprises computer-readable instructions for causing aprogrammable processor to perform any of the embodiments of the abovedescribed method implemented in a transmission point. As anotherexample, in certain embodiments, a computer program product comprises acomputer-readable medium storing the computer program.

According to certain embodiments, uplink power control may be performedaccording to a method in which a UE supports a limited set of options onwhich reference signal or set of reference signals the uplink powercontrol pathloss estimation should be based on. Further, in certainembodiments, which option to use for uplink power control path lossestimation can be configured separately for different channels ordifferent signals. As an example, which option to use for uplink powercontrol path loss estimation can be configured separately for PUCCH,PUSCH, and/or SRS.

According to certain embodiments, a method implemented in a wirelessdevice comprises receiving at least one reference signal from atransmission point, measuring a propagation-related quantity loss on thebasis of the at least one reference signal, and deriving an uplink powersetting on the basis of the measured propagation-related quantity. Thereceiving of the at least one reference signal is performed inaccordance with a configuration related to uplink power control.

According to certain embodiments, a computer program comprisescomputer-readable instructions for causing a programmable processor toperform the method for use in a wireless device.

According to certain embodiments, a wireless device comprising areceiver, a transmitter, processing circuitry and a memory storinginstructions executable by the processing circuitry for: receiving atleast one reference signal from a transmission point; measuring apropagation-related quantity loss on the basis of the at least onereference signal; and deriving an uplink power setting on the basis ofthe measured propagation-related quantity. The receiving of the at leastone reference signal is performed in accordance with a configurationrelated to uplink power control.

According to certain embodiments, a method implemented in a transmissionpoint comprises transmitting first control information indicating aconfiguration related to uplink power control of a wireless device to beserved by the transmission point and transmitting at least one referencesignal.

According to certain embodiments, a transmission point comprises areceiver, a transmitter, processing circuitry and a memory storinginstructions executable by the processing circuitry for transmittingfirst control information indicating a configuration related to uplinkpower control of a wireless device to be served by the transmissionpoint and transmitting at least one reference signal.

According to certain embodiments, a computer program comprisescomputer-readable instructions for causing a programmable processor toperform the method for use in a transmission point.

As one example, in any of the above methods, wireless devices,transmission points, or computer programs, the configuration mayindicate which of multiple reference signals to use for the uplink powercontrol. In certain embodiments, the configuration may be configuredseparately for a specific uplink channel, signal, and/or a group (e.g.,a group comprising one or more uplink channels and/or signals).Additional examples embodiments are further discussed in the sectionsbelow.

Certain embodiments of the present disclosure provide one or moretechnical advantages. A technical advantage of certain embodimentsincludes basing power control on a reference signal (or set of referencesignal) selected from a set of options for the reference signal (or aset of reference signals). A technical advantage of certain embodimentsincludes the ability to base different power control operations ondifferent reference signals (or sets of reference signals). For example,SRS PC may be based on one reference signal (or set of referencesignals), whereas PUCCH and PUSCH may be based on another referencesignal (or set of reference signals). Embodiments of the presentdisclosure may include all, some, or none of these advantages. Otheradvantages may be apparent to those of ordinary skill in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a prior art uplink power controlarrangement. In FIG. 1 , arrows represent signals and boxes representprocessing steps applied to the signals.

FIG. 2 illustrates an example of signal processing in an uplink powercontrol arrangement, according to certain embodiments of the presentdisclosure. In FIG. 2 , arrows represent signals and boxes representprocessing steps applied to the signals.

FIG. 3 illustrates an example of a wireless network, in accordance withcertain embodiments.

FIG. 4 illustrates an example of a wireless device, in accordance withcertain embodiments.

FIG. 5 illustrates an example of components of a wireless device, suchas the wireless device of FIG. 4 , in accordance with certainembodiments.

FIG. 6 illustrates an example of a transmission point, in accordancewith certain embodiments.

FIG. 7 illustrates an example of components of a transmission point,such as the transmission point of FIG. 6 , in accordance with certainembodiments.

FIG. 8 illustrates an example of a method that may be performed by awireless device, in accordance with certain embodiments.

FIG. 9 illustrates an example of a method that may be performed by atransmission point, in accordance with certain embodiments.

FIGS. 10 and 11 illustrate an example of a method that may be performedby a wireless device, in accordance with certain embodiments.

FIG. 12 illustrates an example of a method that may be performed by atransmission point, in accordance with certain embodiments.

DETAILED DESCRIPTION

Example embodiments will now be described in more detail with referenceto the accompanying drawings for which like numerals represent like andcorresponding portions of the various drawings.

FIG. 2 illustrates signal processing in an uplink power controlarrangement according to an example embodiment. The signal processingmay be performed by a wireless device, such as wireless device 310discussed with respect to FIG. 3 . In FIG. 2 , each horizontal linecorresponds to a processing chain for providing a power setting for arespective channel or signal. The signal processing setup is illustratedhere for channels PUSCH and PUCCH and signal SRS, all of which aretransmitted from the wireless device, but can readily be extended toother channels, such as PRACH. It is not essential that the wirelessdevice performs PC in respect of all channels and signals in parallel.It is also not essential that the PC is configurable in a mannerspecific to each channel or signal, but the configurability may have agranularity of a group of one or more channels and/or signals.

The wireless device is allowed to use any reference signal (RS) in the“subset” discussed above, i.e., currently CSI-RS and any of SSs. The“subset” is represented by the admissible RS(s) in FIG. 2 . Asillustrated by respective selection stages 201, 202, 203, the wirelessdevice selects one or more of the admissible RSs in a channel- orsignal-specific fashion. On this RS(s), the wireless device performs ameasurement (or estimation) 211, 212, 213 of a propagation-relatedquantity PL, such as path loss or reference signal received power(RSRP). The propagation-related quantity PL is then fed to a respectivepower calculation block 221, 222, 223, which produces the channel- orsignal-wise power settings symbolized by the arrows to the right. Thewireless device may apply one or more of the power settings. Inparticular, it may transmit an uplink channel or signal with a power inaccordance with a corresponding one of the power settings.

The selection stages 201, 202, 203 may be configured to influence theoperation of a receive chain of the wireless devices, e.g., by causingit to receive at frequency and/or time and/or code settingscorresponding to the transmission of the selected RSs from the network.The selection stages 201, 202, 203 may be pre-configured (e.g.,statically in a network specification, or alternatively semi-staticallyby higher-layer signaling) in a manner causing it to store configurationdata representing a set of configurations, or “options” in the sensediscussed below. The wireless device may then receive controlinformation, denoted x_(SRS), x_(PUSCH), x_(PUCCH) for these channels,which indicates one of the pre-configured configurations. While theconfiguration data may be common for all channels and signals, thecontrol information may be specific to a channel or signal or groupthereof. If the selection stages 201, 202, 203 were pre-configuredstatically, the control information may be contained in semi-staticsignaling. If the selection stages 201, 202, 203 were pre-configuredsemi-statically, the control information may be semi-static as well, ormy alternatively be contained in dynamic signaling, such as downlinkcontrol information (DCI).

The following sections of this disclosure present several exampleembodiments, which may incorporate the same or similar principles asdiscussed above.

Embodiments enabling selection of which RS to use at the UE will bediscussed initially.

Since multiple reference signals types, including at least SS andCSI-RS, can be used for path loss estimation in UL PC in NR a frameworkis needed for which reference signal/set of reference signals the UEshould use for every point in time (and potentially also per frequency).In one embodiment, the UE can be configured to use the reference signalsavailable for UL PC in different ways. A UE may for instance beconfigured with one out of a limited set of options in terms on whichreference signals to use. In one embodiment this limited set of optionsis that the UE should base UL PC on:

C1

-   -   i. SS, or    -   ii. One CSI-RS, or    -   iii. A set of CSI-RSs.        As seen above, the list C1 of options may be pre-defined in a        network specification, such as a specification agreed by the        3GPP; alternatively, the list C1 may be semi-statically        configured. Hence, the UE is configured with one of the options        i)-iii) and then in addition potentially some information about        reference signals themselves, for instance which CST-RS/CST-RSs        for options ii)-iii). Thereby it is made clear what the UE        should measure on when estimating path loss for UL PC.

In one embodiment, the CSI-RS in ii) and/or iii) is constrained to beconfigured as periodic CSI-RS. In another embodiment they may beconfigured to be periodic and/or aperiodic and/or semi static.

In another embodiment, the list of options is instead:

C2

-   -   i. SS, or    -   ii. One CSI-RS and SS, or    -   iii. A set of CSI-RSs.        Hence, it is possible that some of the options include multiple        types of reference signals. In another embodiment, the list of        options is instead:

C3

-   -   i. SS, or    -   ii. A set of CSI-RSs.        In yet another embodiment, the list of options is instead:

C4

-   -   i. TRS, or    -   ii. SS, or    -   iii. One CSI-RS, or    -   iv. A set of CSI-RSs,        where TRS is the tracking reference signal assumed to be part of        NR. In one embodiment “a set of CSI-RSs” is connected to a        CSI-RS beam sweep and the PC may then be based on a CSI-RS        resource indicator (CRI): the PC is hence based on the CSI-RS        resource corresponding to the CRI.

Embodiments connecting the PC loops to the RSs will be discussed next.

Reference is made anew to the previous embodiments where the limited setof options was denoted C1. The following use cases for PUCCH and PUSCHfor the different options can be identified:

-   -   i. SS: A mainstream low-band deployment with a low number of gNB        TX/RX antennas. Here path loss estimation from SS may well        reflect the true path loss.    -   ii. One CSI-RS: For cases where the number of gNB TX/RX antennas        are higher it may be beneficial to capture the beamforming gain        more accurately by utilizing the inherent flexibility in CSI-RS.        The flexibility may include selecting a CSI-RS associated with        an antenna port that matches current operating conditions.        Another use case is when UL transmission is carried out to        another TRP than the one transmitting SS; here PC may work        poorly in case that it was based on SS.    -   iii. A set of CSI-RSs: A high band use case when operating with        beam management procedures which may make it beneficial to also        use beam specific PC. In case that there are N beam pair links,        that the beam management procedures operate on, a set of N        CSI-RSs could be configured and connected to different UE RX/TX        beams in order to get beam specific PC.        For SRS transmission in use case iii), a few different scenarios        are identified. In the first scenario, beam sweeping procedures        are performed, which results in a recommended SRI (SRS resource        indicator). Here it is necessary that all SRSs are transmitted        with the same power, hence the SRS beam sweep PC should be        connected to one PC loop, thus not beam specific. It then        appears natural to connect this PC loop to either i) or ii) as        mentioned above. However, it is in this case not appropriate to        connect the SRS PC to iii). Still, for PUSCH and PUCCH it is        possible that they would operate with beam management and        thereby potentially benefit from using beam specific PC by being        configured with iii).

In a second scenario, PUSCH and PUCCH operate with beam management andthereby potentially beam specific PC using iii), whereas SRStransmission is used for performing link adaptation in areciprocity-based system that utilizes beam management procedures. Here,it would therefore be preferable for the SRS PC to be beam specific andhence connected to the beams in the same manner as PUSCH. Thus, SRS PCshould therefore be configured using iii). In another use case SRS isnot used by the system and the SRS PC does not need to be configured atall.

In one embodiment, the UE is configured with one of the options i)-iii)for SRS PC, and one of the options i)-iii) for PUCCH PC and one of theoptions i)-iii) for PUSCH. This illustrates the ability within thepresent embodiment to configure the UE separately for PUCCH, PUSCH andSRS what option to use for UL PC path loss estimation. In anotherembodiment, it is possible to configure the UE for which option to usefor UL PC path loss estimation separately for SRS, whereas PUCCH andPUSCH share the same option.

In another embodiment, SRS PC is configured to iii) where the size ofthe set of CSI-RSs has been configured to size M whereas PUCCH isconfigured to iii) where the size of the set of CSI-RSs has beenconfigured to size N where N≠M. Hence, by enabling configurationseparately for PUCCH, PUSCH and SRS it will be possible to configuredifferent sets of CSI-RS.

In another embodiment, PUCCH PC is configured using i) whereas PUSCH PCis configured using iii).

FIG. 3 illustrates an example of a wireless network 300 that may be usedfor wireless communications. Wireless network 300 includes a pluralityof radio nodes. Examples of radio nodes include wireless devices 310a-310 b (such as a UE) and transmission points 320 a-320 b (such as agNB, eNB, or base station). The transmission points 320 connect to oneor more core network nodes 330 via an interconnecting network 325.Wireless devices 310 within coverage area 315 may each be capable ofcommunicating directly with transmission points 320 over a wirelessinterface. Wireless devices may also be capable of communicating witheach other via device-to-device (D2D) communication.

As an example, wireless device 310 a may communicate with transmissionpoint 320 a over a wireless interface. That is, wireless device 310 amay transmit wireless signals and/or receive wireless signals fromtransmission point 320 a. The wireless signals may contain voicetraffic, data traffic, control signals, and/or any other suitableinformation. In some embodiments, an area of wireless signal coverageassociated with a transmission point 320 may be referred to as a cell.

In some embodiments wireless device 310 may be interchangeably referredto by the non-limiting term user equipment (UE). Wireless device 310refers to any type of wireless device communicating with a network nodeand/or with another wireless device in a cellular or mobilecommunication system. Examples of wireless devices include targetdevice, device to device (D2D) UE, V2x UE, machine type UE or UE capableof machine to machine (M2M) communication, PDA, PAD, Tablet, mobileterminals, smart phone, laptop embedded equipped (LEE), laptop mountedequipment (LME), USB dongles, etc. Thus, although FIG. 3 illustrateswireless devices 310 as phones, other embodiments may use other types ofwireless devices 310. Example embodiments of wireless device 310 aredescribed in more detail below with respect to FIGS. 4-5 .

In some embodiments transmission point 320 may be interchangeablyreferred to by the non-limiting terms radio access node, gNB, eNB, basestation, network node, or WAN node. The WAN node can be a UE (e.g. D2DUE) or a network node (e.g., access point, base station, cellular node,etc.). Example embodiments of transmission point 320 are described inmore detail below with respect to FIGS. 6-7 .

In certain embodiments, transmission points 320 may interface with aradio network controller. The radio network controller may controltransmission points 320 and may provide certain radio resourcemanagement functions, mobility management functions, and/or othersuitable functions. In certain embodiments, the functions of the radionetwork controller may be included in transmission point 320. The radionetwork controller may interface with a core network node 330. Incertain embodiments, the radio network controller may interface with thecore network node 330 via an interconnecting network 325.

The interconnecting network 325 may refer to any interconnecting systemcapable of transmitting audio, video, signals, data, messages, or anycombination of the preceding. The interconnecting network 325 mayinclude all or a portion of a public switched telephone network (PSTN),a public or private data network, a local area network (LAN), ametropolitan area network (MAN), a wide area network (WAN), a local,regional, or global communication or computer network such as theInternet, a wireline or wireless network, an enterprise intranet, or anyother suitable communication link, including combinations thereof.

In some embodiments, the core network node 330 may manage theestablishment of communication sessions and various otherfunctionalities for wireless devices 310. Wireless devices 310 mayexchange certain signals with the core network node using the non-accessstratum layer. In non-access stratum signaling, signals between wirelessdevices 310 and the core network node 330 may be transparently passedthrough the radio access network. In certain embodiments, transmissionpoints 320 may interface with one or more network nodes over aninternode interface. For example, transmission points 320 a and 320 bmay interface over an internode interface.

Although FIG. 3 illustrates a particular arrangement of network 300, thepresent disclosure contemplates that the various embodiments describedherein may be applied to a variety of networks having any suitableconfiguration. For example, network 300 may include any suitable numberof wireless devices 310 and transmission points 320, as well as anyadditional elements suitable to support communication between wirelessdevices or between a wireless device and another communication device(such as a landline telephone). The embodiments may be implemented inany appropriate type of telecommunication system supporting any suitablecommunication standards and using any suitable components, and areapplicable to any radio access technology (RAT) or multi-RAT systems inwhich the wireless device receives and/or transmits signals (e.g.,data). While some embodiments are described for a particular RAT for thepurposes of example and explanation, other embodiments are applicable toany suitable RAT, which may include LTE, LTE FDD/TDD, NR, WCDMA/HSPA,GSM/GERAN, Wi Fi, WLAN, CDMA2000, etc.

FIG. 4 is a block diagram of an exemplary wireless device 310, inaccordance with certain embodiments. Wireless device 310 includes one ormore each of a wireless interface 412, processing circuitry 414 (e.g.,comprising one or more processors), and memory 416. In some embodiments,wireless interface 412 includes a transmitter that facilitatestransmitting wireless signals to and a receiver that facilitatesreceiving wireless signals from network node/WAN node/transmission point320 (e.g., via an antenna), processing circuitry 414 executesinstructions to provide some or all of the functionality describedherein as being provided by a wireless device (or UE), and memory 416stores the instructions executed by processing circuitry 414.

Processing circuitry 414 may include any suitable combination ofhardware and software implemented in one or more modules to executeinstructions and manipulate data to perform some or all of the describedfunctions of wireless device 310, such receiving at least one referencesignal in accordance with a configuration related to uplink powercontrol, measuring a propagation-related quantity (such as a loss) onthe basis of the at least one reference signal, and deriving an uplinkpower setting based on the measured propagation-related quantity. Incertain embodiments, processing circuitry 414 may include some or all ofthe components discussed with reference to FIG. 2 and/or FIG. 5 herein.In certain embodiments, processing circuitry may perform the methods ofone or more of FIG. 8, 10 , or 11 and/or further example embodiments1-29 discussed below. In some embodiments, processing circuitry 414 mayinclude, for example, one or more computers, one or more centralprocessing units (CPUs), one or more microprocessors, one or moreapplications, one or more application specific integrated circuits(ASICs), one or more field programmable gate arrays (FPGAs) and/or otherlogic.

Memory 416 is generally operable to store instructions, such as acomputer program, software, an application including one or more oflogic, rules, algorithms, code, tables, etc. and/or other instructionscapable of being executed by a processor. Examples of memory 416 includecomputer memory (for example, Random Access Memory (RAM) or Read OnlyMemory (ROM)), mass storage media (for example, a hard disk), removablestorage media (for example, a Compact Disk (CD) or a Digital Video Disk(DVD)), and/or or any other volatile or non-volatile, non-transitorycomputer-readable and/or computer-executable memory devices that storeinformation, data, and/or instructions that may be used by processingcircuitry 414 of wireless device 310.

Other embodiments of wireless device 310 may include additionalcomponents beyond those shown in FIG. 4 that may be responsible forproviding certain aspects of the wireless device's functionality,including any of the functionality described herein and/or anyadditional functionality (including any functionality necessary tosupport the solution described herein). As just one example, wirelessdevice 310 may include input devices and circuits, output devices, andone or more synchronization units or circuits, which may be part of theprocessing circuitry. Input devices include mechanisms for entry of datainto wireless device 310. For example, input devices may include inputmechanisms, such as a microphone, input elements, a display, etc. Outputdevices may include mechanisms for outputting data in audio, videoand/or hard copy format. For example, output devices may include aspeaker, a display, etc.

FIG. 5 illustrates examples of modules that can be included in wirelessdevice 310. In certain embodiments, wireless device 310 may include anyone or more of determining module(s) 502, communication module(s) 504,receiving module(s) 506, user input module(s) 508, display module(s)510, and/or other suitable modules. The functionality of the modules maybe integrated in a single component or separated among severalcomponents in any suitable manner. In certain embodiments, one or moreof the modules may be implemented using processing circuitry 414described with respect to FIG. 4 .

The determining module 502 may perform the processing functions ofwireless device 310 (including any of the wireless device functionalityto support the embodiments described herein, such as the functionalitydescribed with respect to one or more of FIG. 2, 8, 10 , or 11 and/orfurther example embodiments 1-29). As one example, the determiningmodule 502 may determine a configuration related to uplink power controlwith which to receive at least one reference signal, measure apropagation-related quantity (such as a loss) on the basis of receivingthe at least one reference signal, and derive an uplink power settingbased on the measured propagation-related quantity.

The determining module 502 may include or be included in processingcircuitry 414 described above in relation to FIG. 4 . The determiningmodule 502 may include analog and/or digital circuitry configured toperform any of the functions of the determining module 502 and/orprocessing circuitry described above. The functions of the determiningmodule 502 described above may, in certain embodiments, be performed inone or more distinct modules.

The communication module 504 may perform the transmission functions ofwireless device 310. For example, in certain embodiments thecommunication module 504 may communicate uplink signals according to thepower setting derived by the determining module 502. The communicationmodule 504 may include a transmitter and/or a wireless interface, suchas wireless interface 412 described above in relation to FIG. 4 . Thecommunication module 504 may include circuitry configured to wirelesslytransmit messages and/or signals. In particular embodiments, thecommunication module 504 may receive messages and/or signals fortransmission from the determining module 502. In certain embodiments,the functions of the communication module 504 described above may beperformed in one or more distinct modules.

The receiving module 506 may perform the receiving functions of wirelessdevice 310. For example, the receiving module 506 may receiveinformation from a network node (e.g., transmission point 320). Theinformation could include at least one reference signal receivedaccording to a configuration related to uplink power. Additionally, incertain embodiments, the configuration related to uplink power may bereceived from the network node (e.g., FIG. 9 ). The receiving module 506may include a receiver and/or a wireless interface, such as wirelessinterface 412 described above in relation to FIG. 4 . The receivingmodule 506 may include circuitry configured to wirelessly receivemessages and/or signals. In certain embodiments, the receiving module506 may include circuitry configured to receive information from memory416 of wireless device 310. In particular embodiments, the receivingmodule 506 may communicate received messages and/or signals to thedetermining module 502. The functions of the receiving module 506described above may, in certain embodiments, be performed in one or moredistinct modules.

In certain embodiments, wireless device 310 may optionally include auser input module 508 that may receive user input intended for wirelessdevice 310. For example, the user input module 508 may receive keypresses, button presses, touches, swipes, audio signals, video signals,and/or any other appropriate signals. The user input module 508 mayinclude one or more keys, buttons, levers, switches, touchscreens,microphones, and/or cameras. The user input module 508 may communicatereceived signals to the determining module 502. The functions of theuser input module 508 described above may, in certain embodiments, beperformed in one or more distinct modules.

In certain embodiments, wireless device 310 may optionally include adisplay module 510, which may present signals on a display of wirelessdevice 310. The display module 510 may include the display and/or anyappropriate circuitry and hardware configured to present signals on thedisplay. The display module may receive signals to present on thedisplay from the determining module 502. The functions of the displaymodule 502 described above may, in certain embodiments, be performed inone or more distinct modules.

Each module depicted in FIG. 5 may include any suitable configuration ofhardware and/or software. Wireless device 310 may include additionalmodules beyond those shown in FIG. 5 that may be responsible forproviding any suitable functionality, including any of the functionalitydescribed above and/or any additional functionality (including anyfunctionality necessary to support the various solutions describedherein).

In certain embodiments, some or all of the modules shown in FIG. 5 canbe combined with one or more modules shown in FIG. 4 . As an example,certain embodiments may combine at least some of the functionality ofthe processing circuitry (FIG. 4 ) with the determining module (FIG. 5). As another example, certain embodiments may combine at least some ofthe functionality of the wireless interface (FIG. 4 ) with thecommunication and/or receiving modules (FIG. 5 ).

FIG. 6 is a block diagram of an exemplary network node, such astransmission point 320, in accordance with certain embodiments.Transmission point 320 may include one or more of wireless interface(s)622, processing circuitry 624 (e.g., comprising one or more processors),memory (or memories) 626, and/or network interface(s) 628. In someembodiments, wireless interface 622 comprises a transmitter thatfacilitates transmitting wireless signals to and a receiver thatfacilitates receiving wireless signals from wireless device 310 (e.g.,via an antenna), processing circuitry 624 executes instructions toprovide some or all of the functionality described herein as beingprovided by a transmission point 320, memory 626 stores the instructionsexecuted by processing circuitry 624, and network interface 628communicates signals to backend network components, such as a gateway,switch, router, Internet, Public Switched Telephone Network (PSTN), corenetwork nodes or radio network controllers, etc.

Processing circuitry 624 may include any suitable combination ofhardware and software implemented in one or more modules to executeinstructions and manipulate data to perform some or all of the describedfunctions of transmission point 320, such as the functions oftransmitting a configuration related to uplink power control of awireless device to be served by the transmission point and transmittingone or more reference signals. Examples of functionality performed by atransmission point's processing circuitry 624 are described below withrespect to FIGS. 9 and 12 and further example embodiments 30-47.Examples of a configuration related to uplink power control of awireless device that may be transmitted by the transmission point 320are also discussed with respect to FIG. 2 . In some embodiments,processing circuitry 624 may include, for example, one or morecomputers, one or more central processing units (CPUs), one or moremicroprocessors, one or more applications, and/or other logic. Incertain embodiments, processing circuitry 624 may comprise one or moreof the modules discussed with respect to FIG. 7 .

Memory 626 is generally operable to store instructions, such as acomputer program, software, an application including one or more oflogic, rules, algorithms, code, tables, etc. and/or other instructionscapable of being executed by a processor. Examples of memory 626 includecomputer memory (for example, Random Access Memory (RAM) or Read OnlyMemory (ROM)), mass storage media (for example, a hard disk), removablestorage media (for example, a Compact Disk (CD) or a Digital Video Disk(DVD)), and/or or any other volatile or non-volatile, non-transitorycomputer-readable and/or computer-executable memory devices that storeinformation.

In some embodiments, network interface 628 is communicatively coupled toprocessing circuitry 624, and network interface 628 may refer to anysuitable device operable to receive input for transmission point 320,send output from transmission point 320, perform suitable processing ofthe input or output or both, communicate to other devices, or anycombination of the preceding. Network interface 628 may includeappropriate hardware (e.g., port, modem, network interface card, etc.)and software, including protocol conversion and data processingcapabilities, to communicate through a network.

Other embodiments of transmission point 320 may include additionalcomponents beyond those shown in FIG. 6 that may be responsible forproviding certain aspects of the transmission point 320's functionality,including any of the functionality described herein and/or anyadditional functionality (including any functionality necessary tosupport the solutions described herein). Core network node 330 may havecomprise similar components as those shown in FIG. 6 , however, awireless interface (e.g., wireless interface 622) is optional for thecore network node 330. The various different types of network nodes mayinclude components having the same physical hardware but configured(e.g., via programming) to support different radio access technologies,or may represent partly or entirely different physical components.

FIG. 7 illustrates examples of modules that can be included intransmission point 320.

In certain embodiments, transmission point 320 may include any one ormore of determining module(s) 702, communication module(s) 704,receiving module(s) 706, and/or other suitable modules. Thefunctionality of the modules may be integrated in a single component orseparated among several components in any suitable manner. In certainembodiments, one or more of the modules may be implemented usingprocessing circuitry 624 described with respect to FIG. 6 .

The determining module 702 may perform the processing functions oftransmission point 320 (including any of the transmission pointfunctionality to support the embodiments described herein, such as thefunctionality described with respect to one or more of FIG. 9 or 12and/or further example embodiments 30-47). As one example, thedetermining module 702 may determine a configuration related to uplinkpower control of a wireless device to be served by the transmissionpoint. Certain embodiments of the configuration are discussed herein,for example, with respect to FIG. 2 .

The determining module 702 may include analog and/or digital circuitryconfigured to perform any of the functions of the determining module 702and/or processing circuitry 624 described above. The functions of thedetermining module 702 described above may, in certain embodiments, beperformed in one or more distinct modules.

The communication module 704 may perform the transmission functions oftransmission point 320. As one example, the communication module 704 maytransmit to wireless device 310 a configuration related to uplink powercontrol of a wireless device to be served by the transmission point. Asanother example, the communication module 704 may transmit one or morereference signals. The communication module 704 may include atransmitter and/or a wireless interface, such as wireless interface 622described above in relation to FIG. 6 . As another example, thecommunication module 704 may send information to other transmissionpoints 320. The communication module 704 may include a networkinterface, such as interface 628 described above in relation to FIG. 6 .The communication module 704 may include circuitry configured totransmit wireless and/or wired messages and/or signals. In particularembodiments, the communication module 704 may receive messages and/orsignals for transmission from the determining module. In certainembodiments, the functions of the communication module 704 describedabove may be performed in one or more distinct modules.

The receiving module 706 may perform the receiving functions oftransmission point 320. For example, the messages from wireless device310. The receiving module 706 may include a receiver and/or a wirelessinterface, such as wireless interface 622 described above in relation toFIG. 6 . As another example, the receiving module 706 may receiveinformation from other transmission points 320. The receiving module 706may include a network interface, such as interface 628 described inrelation to FIG. 6 . The receiving module 706 may include circuitryconfigured to receive wireless and/or wired messages and/or signals. Incertain embodiments, the receiving module 706 may include circuitryconfigured to receive information from memory 624 of transmission point320. In particular embodiments, the receiving module 706 may communicatereceived messages and/or signals to the determining module. Thefunctions of the receiving module 706 described above may, in certainembodiments, be performed in one or more distinct modules.

In certain embodiments, some or all of the modules shown in FIG. 7 canbe combined with one or more modules shown in FIG. 6 . As an example,certain embodiments may combine at least some of the functionality ofthe processing circuitry (FIG. 6 ) with the determining module (FIG. 7).

FIG. 8 illustrates an example of a method for use in a wireless device310, in accordance with certain embodiments. At step 802, the methodreceives at least one reference signal from a transmission point 320.The receiving is performed in accordance with a configuration related touplink power control. In certain embodiments, the configuration mayindicate which of multiple reference signals to use for the uplink powercontrol. In certain embodiments, the configuration may be configuredseparately for a specific uplink channel, signal, and/or a group (e.g.,a group comprising one or more uplink channels and/or signals).Additional examples of configurations are discussed, e.g., with respectto FIG. 2 and further example embodiments 1-29. At step 804, the methodmeasures a propagation-related quantity loss on the basis of the atleast one reference signal. At step 806, the method derives an uplinkpower setting on the basis of the measured propagation-related quantity.The method may further comprise sending uplink signals according to thederived uplink power setting. In certain embodiments, different uplinkpower settings may be derived for different uplink channels, signals,and/or groups thereof.

FIG. 9 illustrates an example of a method for use in a transmissionpoint 320, in accordance with certain embodiments. At step 902, themethod transmits first control information indicating a configurationrelated to uplink power control of a wireless device to be served by thetransmission point. In certain embodiments, the configuration mayindicate which of multiple reference signals to use for the uplink powercontrol. In certain embodiments, the configuration may be configuredseparately for a specific uplink channel, signal, and/or a group (e.g.,a group comprising one or more uplink channels and/or signals). At step904, the method transmits at least one reference signal.

In an example embodiment, to enable a way for the UE to efficientlyestimate the path loss, it is proposed to configure the UE with one of alimited set of options in terms of which reference signal/set ofreference signals to use for UL PC, and to apply this configurationseparately for SRS, PUCCH and PUSCH, and possibly PRACH. This exampleembodiment may make it possible to base for instance SRS PC on onereference signal/set of reference signals whereas PUCCH and PUSCH isbased on another reference signal/set of reference signals. This may bebeneficial in some use cases.

FIG. 10 illustrates an example of a method implemented in a wirelessdevice, such as wireless device 310 discussed above. The methodillustrated in FIG. 10 begins at step 1002 with determiningconfiguration data representing a set of configurations. For example,the configuration data can be determined by receiving the configurationdata from a network node, such as transmission point 320 discussedabove. In certain embodiments, the configuration data is received insemi-static signaling. In certain embodiments, the set of configurationsis specific to an uplink channel or signal or group thereof. Examples ofa channel or signal or group thereof can include one or more of PUSCH,PUCCH, and/or SRS. In certain embodiments, the configuration dataindicates a size of a set of reference signals in each configuration.

The method proceeds to step 1004 with receiving at least one referencesignal from a transmission point, such as transmission point 320discussed above. The receiving of the at least one reference signal isperformed in accordance with a configuration selected from the set ofconfigurations determined in step 1002. The selected configurationrelates to uplink power control and is specific to an uplink channel orsignal or a group thereof. In certain embodiments, the selection of theconfiguration is made based on receiving control information, as furtherdiscussed below with respect to FIG. 11 . In certain embodiments, theconfiguration is independently selectable from the set for each timesegment or each frequency segment or each time-frequency tile.

At step 1006, the method proceeds with measuring a propagation-relatedquantity on the basis of the at least one reference signal. Examples ofa propagation-related quantity include path loss relative to thetransmission point and/or a path loss-related quantity. At step 1008,the method comprises deriving an uplink power setting on the basis ofthe measured propagation-related quantity. The wireless device can thensend uplink signals in accordance with the uplink power setting derivedin step 1008.

FIG. 11 illustrates an example of a method implemented in a wirelessdevice, such as wireless device 310 discussed above. At step 1102, themethod comprises receiving first control information. For example, thefirst control information can be received from a network node, such astransmission point 320 discussed above. The first control informationcan be received in dynamic signaling, such as in DCI, or semi-staticsignaling, such as higher layer signaling. The first control informationindicates a selected configuration in a set of configurations. Incertain embodiments, the first control information is specific for anuplink channel or signal or group thereof.

In certain embodiments, the method further comprises receiving secondcontrol information, as shown in step 1104 of FIG. 11 . The secondcontrol information is specific to an uplink channel or signal or groupthereof that is different than the uplink channel or signal or groupthereof to which the first control information pertains. The secondcontrol information is related to a same time or frequency position asthe first control information in the sense that time or frequencyposition is the same at the level of granularity at which the firstcontrol information and second control information are conveyed. Inparticular, if the control information applies to one cell at a time,then two frequencies or frequency intervals may be understood as a “samefrequency position” if they are contained in the frequency interval ofthe same cell. Similarly, if the control information applies to one ormore slots, then two points in time or time intervals may be a “sametime position” if they are contained in the same slot or finite set ofconsecutive slots.

With reference to FIG. 10 , the first control information indicateswhich of the set of configurations determined in step 1002 to select forreceiving at least one reference signal in step 1004 in order to measurea propagation-related quantity (step 1006) and derive an uplink powersetting (1008) for an uplink channel or signal or group thereof. Thesecond control information indicates which of the set of configurationsdetermined in step 1002 to select for receiving at least one referencesignal in step 1004 in order to measure a propagation-related quantity(step 1006) and derive an uplink power setting (1008) for a differentuplink channel or signal or group thereof.

Additional examples of configurations that may be used in the methods ofFIGS. 10 and/or 11 are discussed, e.g., with respect to FIG. 2 above andfurther example embodiments 1-29 below.

FIG. 12 illustrates an example of a method implemented in a transmissionpoint, such as transmission point 320 discussed above. At step 1202, themethod comprises transmitting configuration data. As an example, theconfiguration data can be transmitted in semi-static signaling. Theconfiguration data represents a set of configurations related to uplinkpower control of a wireless device (e.g., wireless device 310) to beserved by the transmission point. In certain embodiments, the set ofconfigurations is specific to an uplink channel or signal or groupthereof. Examples of an uplink channel or signal or group thereofinclude a PUSCH, PUCCH, and/or SRS. In certain embodiments, theconfiguration data indicates a size of a set of reference signals ineach configuration.

At step 1204, the method comprises transmitting at least one referencesignal. As discussed above with respect to FIG. 10 , the wireless devicereceives the reference in accordance with a selected configuration inthe set of configurations in order to derive an uplink power setting. Incertain embodiments, the transmission point can indicate the selectedconfiguration to the wireless device. For example, FIG. 12 illustratesan embodiment in which the method may further comprise transmittingfirst control information in step 1206. For example, the first controlinformation can be transmitted in dynamic signaling, such as in DCI, orsemi-static signaling, such as higher layer signaling. The first controlinformation indicates a selected configuration in the set ofconfigurations. In certain embodiments, the first control information isspecific for an uplink channel or signal or group thereof. In certainembodiments, the configuration is independently selectable from the setfor each time segment or each frequency segment or each time-frequencytile.

In certain embodiments, the method further comprises transmitting secondcontrol information in step 1208. The second control informationindicates a selected configuration. As discussed above, the selectedconfiguration indicated by the first control information of step 1206 isspecific to an uplink channel or signal or group thereof. In step 1208,the selected configuration indicated by the second control informationis specific to a different uplink channel or signal or group thereof.The second control information is related to a same time or frequencyposition as the first control information in the sense that time orfrequency position is the same at the level of granularity at which thefirst control information and second control information are conveyed.In particular, if the control information applies to one cell at a time,then two frequencies or frequency intervals may be understood as a “samefrequency position” if they are contained in the frequency interval ofthe same cell. Similarly, if the control information applies to one ormore slots, then two points in time or time intervals may be a “sametime position” if they are contained in the same slot or finite set ofconsecutive slots.

Additional examples of configurations that may be used in the method ofFIG. 12 are discussed, e.g., with respect to FIG. 2 above and furtherexample embodiments 30-47 below.

A concise description of advantageous example embodiments follows.

1. A method implemented in a wireless device, comprising:

receiving at least one reference signal from a transmission point;

measuring a propagation-related quantity loss on the basis of the atleast one reference signal; and

deriving an uplink power setting on the basis of the measuredpropagation-related quantity,

wherein said receiving of at least one reference signal is performed inaccordance with a configuration related to uplink power control.

2. The method of embodiment 1, wherein the uplink power setting isspecific to an uplink channel or signal or a group of thereof.

3. The method of embodiment 2, wherein the channel or signal or groupthereof is one or more of: PUSCH, PUCCH, PRACH, SRS.

4. The method of any of the preceding embodiments, wherein theconfiguration is specific to an uplink channel or signal or a groupthereof.

5. The method of embodiment 4, wherein the channel or signal or groupthereof is one or more of: PUSCH, PUCCH, PRACH, SRS.

6. The method of embodiment 5, wherein the configuration for SRS isdifferent from the configuration for PUSCH.

7. The method of any of the preceding embodiments, wherein the uplinkpower setting is derived in accordance with a predefined rule specificto an uplink channel or signal or group thereof.

8. The method of any of the preceding embodiments, further comprisingdetermining configuration data representing a set of configurations,wherein the configuration is selected from the set.

9. The method of embodiment 8, wherein the set of configurationsincludes at least one configuration suitable for non-beam-specificuplink power control and at least one configuration suitable forbeam-specific uplink power control.

10. The method of embodiment 8 or 9, wherein the configuration isindependently selectable from the set for each time segment or eachfrequency segment or each time-frequency tile.

11. The method of embodiment 10, wherein one of the following holds: thetime segment is a slot or mini-slot; the time segment is a subframe; thetime segment is radio frame; the frequency segment is a subcarrier thefrequency segment is a frequency band; the time-frequency tile is aresource block

12. The method of any of embodiment 8 to 11, wherein the configurationdata is received in semi-static signaling.

13. The method of any of embodiments 8 to 11, wherein the set ofconfigurations is pre-defined in a network specification.

14. The method of embodiment 12 or 13, further comprising receivingfirst control information indicating the configuration by selecting oneconfiguration in the set of configurations.

15. The method of any of the preceding embodiments, further comprisingreceiving first control information indicating the configuration.

16. The method of embodiment 14 or 15, wherein the first controlinformation is received in dynamic signaling.

17. The method of any of embodiments 14 to 16, wherein the first controlinformation is specific for an uplink channel or signal or groupthereof.

18. The method of embodiment 17, further comprising receiving secondcontrol information, wherein the second control information is relatedto a same time or frequency position as the first control informationbut is specific to a different uplink channel or signal or groupthereof.

19. The method of any of embodiments 8 to 18, wherein the set ofconfigurations is specific to an uplink channel or signal or a groupthereof.

20. The method of embodiment 20, wherein a configuration for SRS isdifferent from a configuration for PUSCH.

21. The method of any of the preceding embodiments, wherein theconfiguration is applicable at least for non-beam-specific uplink powercontrol.

22. The method of any of the preceding embodiments, wherein theconfiguration is applicable for uplink power control of a wirelessdevice operating in a relatively lower range of its frequencycapability.

23. The method of any of the preceding embodiments, wherein thepropagation-related quantity is one or more of: path loss relative tothe transmission point; a RSRP; a coupling loss; a path loss-relatedquantity.

24. The method of any of the preceding embodiments, wherein the uplinkpower setting is derived in accordance with a predefined rule.

25. The method of embodiment 24, wherein the predefined rule furtherconsiders one or more of: a configured transmit power of a serving cell;a bandwidth of a transmission resource; a modulation and coding setting;a configured correction value.

26. The method of any of the preceding embodiments, further comprisingapplying the uplink power setting to an uplink transmission.

27. A wireless device comprising a receiver, a transmitter, processingcircuitry and a memory storing instructions executable by the processingcircuitry for:

receiving at least one reference signal from a transmission point;

measuring a propagation-related quantity loss on the basis of the atleast one reference signal; and

deriving an uplink power setting on the basis of the measuredpropagation-related quantity,

wherein said receiving of at least one reference signal is performed inaccordance with a configuration related to uplink power control.

28. The wireless device of embodiment 27, wherein the memory furthercomprises instructions for performing the method of any of embodiments 2to 18.

29. The wireless device of embodiment 27 or 28, wherein the wirelessdevice is a user equipment.

30. A method implemented in a transmission point, comprising:

transmitting first control information indicating a configurationrelated to uplink power control of a wireless device to be served by thetransmission point; and

transmitting at least one reference signal.

31. The method of embodiment 30, further comprising transmittingconfiguration data representing a set of configurations.

32. The method of embodiment 31, wherein the set of configurationsincludes at least one configuration suitable for non-beam-specificuplink power control and at least one configuration suitable forbeam-specific uplink power control.

33. The method of any of embodiments 30 to 32, wherein the configurationis independently selectable from the set for each time segment or eachfrequency segment or each time-frequency tile by a wireless device to beserved by the transmission point.

34. The method of embodiment 33, wherein one of the following holds: thetime segment is a slot or mini-slot; the frequency segment is asubcarrier; the time-frequency tile is a resource block

35. The method of any of embodiment 30 to 34, wherein the configurationdata is transmitted in semi-static signaling.

36. The method of any of embodiments 30 to 35, wherein the first controlinformation indicates the configuration by selecting one configurationin a set of configurations.

37. The method of embodiment 36, wherein the first control informationis transmitted in semi-static or dynamic signaling.

38. The method of any of embodiments 30 to 37, wherein the first controlinformation is specific to an uplink channel or signal or group thereof.

39. The method of embodiment 38, further comprising transmitting secondcontrol information, wherein the second control information is relatedto a same time or frequency position as the first control informationbut is specific to a different uplink channel or signal or groupthereof.

40. The method of embodiment 38 or 39, wherein the channel or signal orgroup thereof is one or more of: PUSCH, PUCCH, PRACH, SRS.

41. The method of any of embodiments 31 to 40, wherein the set ofconfigurations is specific to an uplink channel or signal or a groupthereof.

42. The method of embodiment 41, wherein a configuration for SRS isdifferent from a configuration for PUSCH.

43. A transmission point comprising a receiver, a transmitter,processing circuitry and a memory storing instructions executable by theprocessing circuitry for:

transmitting first control information indicating a configurationrelated to uplink power control of a wireless device to be served by thetransmission point; and

transmitting at least one reference signal.

44. The transmission point of embodiment 43, wherein the memory furthercomprises instructions for performing the method of any of embodiments30 to 42.

45. The transmission point of embodiment 43 or 44, wherein thetransmission point is a base station, such as a gNB.

46. A computer program comprising computer-readable instructions forcausing a programmable processor to perform the method of any ofembodiments 1 to 26 or any of embodiments 30 to 42.

47. A computer program product comprising a computer-readable mediumstoring the computer program of embodiment 46.

Although terminology from 3GPP LTE has been used in this disclosure toexemplify the invention, this should not be seen as limiting the scopeof the invention to only the aforementioned system. Other wirelesssystems, especially 5G/NR, WCDMA, WiMax, UMB and GSM, may also benefitfrom exploiting the ideas covered within this disclosure.

NR terminology and LTE terminology coincide to a considerable extent;for instance, a resource element (RE) remains 1 subcarrier×1 OFDMsymbol. Yet some terms known in LTE have been given a new meaning in NR.In this disclosure, including the claims, prefixes “LTE” and “NR” may beused to clarify the relevant technical context. Examples: An LTEsubframe lasting 1 ms contains 14 OFDM symbols for normal CP. An NRsubframe has a fixed duration of 1 ms and may therefore contain adifferent number of OFDM symbols for different subcarrier spacings. AnLTE slot corresponds to 7 OFDM symbols for normal CP. An NR slotcorresponds to 7 or 14 OFDM symbols; at 15 kHz subcarrier spacing, aslot with 7 OFDM symbols occupies 0.5 ms. Reference is made to 3GPP TR38.802 v14.0.0. Therefore, even though some embodiments of thisdisclosure have been described using LTE-originated terminology, theyremain fully applicable to NR technology.

Modifications, additions, or omissions may be made to the systems andapparatuses described herein without departing from the scope of thedisclosure. The components of the systems and apparatuses may beintegrated or separated. Moreover, the operations of the systems andapparatuses may be performed by more, fewer, or other components.Additionally, operations of the systems and apparatuses may be performedusing any suitable logic comprising software, hardware, and/or otherlogic. As used in this document, “each” refers to each member of a setor each member of a subset of a set.

Modifications, additions, or omissions may be made to the methodsdescribed herein without departing from the scope of the disclosure. Themethods may include more, fewer, or other steps. Additionally, steps maybe performed in any suitable order. Generally, all terms used in theclaims are to be interpreted according to their ordinary meaning in thetechnical field, unless explicitly defined otherwise herein. Allreferences to “a/an/the element, apparatus, component, means, step,etc.” are to be interpreted openly as referring to at least one instanceof the element, apparatus, component, means, step, etc., unlessexplicitly stated otherwise. The steps of any method disclosed herein donot have to be performed in the exact order disclosed, unless explicitlystated.

Although this disclosure has been described in terms of certainembodiments, alterations and permutations of the embodiments will beapparent to those skilled in the art. Accordingly, the above descriptionof the embodiments does not constrain this disclosure. Other changes,substitutions, and alterations are possible without departing from thespirit and scope of this disclosure.

1. A method implemented in a wireless device, comprising: determining configuration data representing a set of configurations; receiving at least one reference signal from a transmission point; measuring a propagation-related quantity on the basis of the at least one reference signal; and deriving an uplink power setting on the basis of the measured propagation-related quantity; wherein said receiving of at least one reference signal is performed in accordance with a configuration selected from the set, wherein the configuration is related to uplink power control and is specific to an uplink channel or signal or a group thereof.
 2. The method of claim 1, wherein the set of configurations is specific to the uplink channel or signal or group thereof.
 3. The method of claim 1, wherein the configuration data indicates a size of a set of reference signals in each configuration.
 4. The method of claim 1, wherein the configuration data is received in semi-static signaling.
 5. The method of claim 1, further comprising receiving first control information indicating the selected configuration in the set of configurations.
 6. The method of claim 5, wherein the first control information is specific for an uplink channel or signal or group thereof.
 7. The method of claim 5, wherein the first control information is received in dynamic signaling.
 8. The method of claim 5, wherein the first control information is received in semi-static signaling.
 9. The method of claim 5, further comprising receiving second control information, wherein the second control information is related to a same time or frequency position as the first control information but is specific to a different uplink channel or signal or group thereof.
 10. The method of claim 1, wherein the channel or signal or group thereof is one or more of physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and/or sounding reference signal (SRS).
 11. The method of claim 1, wherein the propagation-related quantity is one or more of: path loss relative to the transmission point; a path loss-related quantity.
 12. The method of claim 1, wherein the configuration is independently selectable from the set for each time segment or each frequency segment or each time-frequency tile.
 13. A method implemented in a transmission point, comprising: transmitting configuration data representing a set of configurations related to uplink power control of a wireless device to be served by the transmission point; and transmitting at least one reference signal.
 14. The method of claim 13, wherein the set of configurations is specific to an uplink channel or signal or group thereof.
 15. The method of claim 13, wherein the configuration data indicates a size of a set of reference signals in each configuration.
 16. The method of claim 13, wherein the configuration data is transmitted in semi-static signaling.
 17. The method of claim 13, further comprising transmitting first control information indicating a selected configuration in the set of configurations.
 18. The method of claim 17, wherein the first control information is specific for an uplink channel or signal or group thereof. 19.-23. (canceled)
 24. A wireless device comprising a receiver, a transmitter, processing circuitry and a memory storing instructions executable by the processing circuitry for: determining configuration data representing a set of configurations; receiving at least one reference signal from a transmission point; measuring a propagation-related quantity on the basis of the at least one reference signal; and deriving an uplink power setting on the basis of the measured propagation-related quantity; wherein said receiving of at least one reference signal is performed in accordance with a configuration selected from the set, wherein the configuration is related to uplink power control and is specific to an uplink channel or signal or a group thereof.
 25. The wireless device of claim 24, wherein the wireless device is a user equipment.
 26. A transmission point comprising a receiver, a transmitter, processing circuitry and a memory storing instructions executable by the processing circuitry for: transmitting configuration data representing a set of configurations related to uplink power control of a wireless device to be served by the transmission point; and transmitting at least one reference signal.
 27. The transmission point of claim 26, wherein the transmission point is a base station, such as a gNB.
 28. A computer program comprising computer-readable instructions for causing a programmable processor to perform the method of claim
 1. 29. A computer program product comprising a computer-readable medium storing the computer program of claim
 28. 30. A computer program comprising computer-readable instructions for causing a programmable processor to perform the method of claim
 13. 31. A computer program product comprising a computer-readable medium storing the computer program of claim
 30. 